Why does a fuel engine make more power the more it's loaded or more importantly, why does it drop cylinders when unloaded (hazing)?
If peak torque RPM is a direct function of port velocity, then why does a longer duration cam move the curve to the right (up)? It seems that the longer duration would move more air, therefore bringing the critical velocity in earlier.
If they improve economy and performance, why don't factory cars have headers?
How far can you go with raising port entry/exits before there is no benefit? A straight pipe looking right down on the valve?
How much fuel is injected above the blower in a modern day fuel engine and why?
That's it for now. Let me know if you want more.